summaryrefslogtreecommitdiff
path: root/drivers/isdn/mISDN/dsp_blowfish.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/isdn/mISDN/dsp_blowfish.c')
-rw-r--r--drivers/isdn/mISDN/dsp_blowfish.c112
1 files changed, 56 insertions, 56 deletions
diff --git a/drivers/isdn/mISDN/dsp_blowfish.c b/drivers/isdn/mISDN/dsp_blowfish.c
index 18e411e95bba..0aa572f3858d 100644
--- a/drivers/isdn/mISDN/dsp_blowfish.c
+++ b/drivers/isdn/mISDN/dsp_blowfish.c
@@ -354,8 +354,8 @@ static const u32 bf_sbox[256 * 4] = {
#define GET32_1(x) (((x) >> (16)) & (0xff))
#define GET32_0(x) (((x) >> (24)) & (0xff))
-#define bf_F(x) (((S[GET32_0(x)] + S[256 + GET32_1(x)]) ^ \
- S[512 + GET32_2(x)]) + S[768 + GET32_3(x)])
+#define bf_F(x) (((S[GET32_0(x)] + S[256 + GET32_1(x)]) ^ \
+ S[512 + GET32_2(x)]) + S[768 + GET32_3(x)])
#define EROUND(a, b, n) do { b ^= P[n]; a ^= bf_F(b); } while (0)
#define DROUND(a, b, n) do { a ^= bf_F(b); b ^= P[n]; } while (0)
@@ -388,17 +388,17 @@ dsp_bf_encrypt(struct dsp *dsp, u8 *data, int len)
j = 0;
/* transcode 9 samples xlaw to 8 bytes */
yl = dsp_audio_law2seven[bf_data_in[0]];
- yl = (yl<<7) | dsp_audio_law2seven[bf_data_in[1]];
- yl = (yl<<7) | dsp_audio_law2seven[bf_data_in[2]];
- yl = (yl<<7) | dsp_audio_law2seven[bf_data_in[3]];
+ yl = (yl << 7) | dsp_audio_law2seven[bf_data_in[1]];
+ yl = (yl << 7) | dsp_audio_law2seven[bf_data_in[2]];
+ yl = (yl << 7) | dsp_audio_law2seven[bf_data_in[3]];
nibble = dsp_audio_law2seven[bf_data_in[4]];
yr = nibble;
- yl = (yl<<4) | (nibble>>3);
- yr = (yr<<7) | dsp_audio_law2seven[bf_data_in[5]];
- yr = (yr<<7) | dsp_audio_law2seven[bf_data_in[6]];
- yr = (yr<<7) | dsp_audio_law2seven[bf_data_in[7]];
- yr = (yr<<7) | dsp_audio_law2seven[bf_data_in[8]];
- yr = (yr<<1) | (bf_data_in[0] & 1);
+ yl = (yl << 4) | (nibble >> 3);
+ yr = (yr << 7) | dsp_audio_law2seven[bf_data_in[5]];
+ yr = (yr << 7) | dsp_audio_law2seven[bf_data_in[6]];
+ yr = (yr << 7) | dsp_audio_law2seven[bf_data_in[7]];
+ yr = (yr << 7) | dsp_audio_law2seven[bf_data_in[8]];
+ yr = (yr << 1) | (bf_data_in[0] & 1);
/* fill unused bit with random noise of audio input */
/* encrypt */
@@ -423,24 +423,24 @@ dsp_bf_encrypt(struct dsp *dsp, u8 *data, int len)
yr ^= P[17];
/* calculate 3-bit checksumme */
- cs = yl ^ (yl>>3) ^ (yl>>6) ^ (yl>>9) ^ (yl>>12) ^ (yl>>15)
- ^ (yl>>18) ^ (yl>>21) ^ (yl>>24) ^ (yl>>27) ^ (yl>>30)
- ^ (yr<<2) ^ (yr>>1) ^ (yr>>4) ^ (yr>>7) ^ (yr>>10)
- ^ (yr>>13) ^ (yr>>16) ^ (yr>>19) ^ (yr>>22) ^ (yr>>25)
- ^ (yr>>28) ^ (yr>>31);
+ cs = yl ^ (yl >> 3) ^ (yl >> 6) ^ (yl >> 9) ^ (yl >> 12) ^ (yl >> 15)
+ ^ (yl >> 18) ^ (yl >> 21) ^ (yl >> 24) ^ (yl >> 27) ^ (yl >> 30)
+ ^ (yr << 2) ^ (yr >> 1) ^ (yr >> 4) ^ (yr >> 7) ^ (yr >> 10)
+ ^ (yr >> 13) ^ (yr >> 16) ^ (yr >> 19) ^ (yr >> 22) ^ (yr >> 25)
+ ^ (yr >> 28) ^ (yr >> 31);
/*
* transcode 8 crypted bytes to 9 data bytes with sync
* and checksum information
*/
- bf_crypt_out[0] = (yl>>25) | 0x80;
- bf_crypt_out[1] = (yl>>18) & 0x7f;
- bf_crypt_out[2] = (yl>>11) & 0x7f;
- bf_crypt_out[3] = (yl>>4) & 0x7f;
- bf_crypt_out[4] = ((yl<<3) & 0x78) | ((yr>>29) & 0x07);
- bf_crypt_out[5] = ((yr>>22) & 0x7f) | ((cs<<5) & 0x80);
- bf_crypt_out[6] = ((yr>>15) & 0x7f) | ((cs<<6) & 0x80);
- bf_crypt_out[7] = ((yr>>8) & 0x7f) | (cs<<7);
+ bf_crypt_out[0] = (yl >> 25) | 0x80;
+ bf_crypt_out[1] = (yl >> 18) & 0x7f;
+ bf_crypt_out[2] = (yl >> 11) & 0x7f;
+ bf_crypt_out[3] = (yl >> 4) & 0x7f;
+ bf_crypt_out[4] = ((yl << 3) & 0x78) | ((yr >> 29) & 0x07);
+ bf_crypt_out[5] = ((yr >> 22) & 0x7f) | ((cs << 5) & 0x80);
+ bf_crypt_out[6] = ((yr >> 15) & 0x7f) | ((cs << 6) & 0x80);
+ bf_crypt_out[7] = ((yr >> 8) & 0x7f) | (cs << 7);
bf_crypt_out[8] = yr;
}
@@ -474,45 +474,45 @@ dsp_bf_decrypt(struct dsp *dsp, u8 *data, int len)
* shift upper bit and rotate data to buffer ring
* send current decrypted data
*/
- sync = (sync<<1) | ((*data)>>7);
+ sync = (sync << 1) | ((*data) >> 7);
bf_crypt_inring[j++ & 15] = *data;
*data++ = bf_data_out[k++];
i++;
if (k == 9)
k = 0; /* repeat if no sync has been found */
/* check if not in sync */
- if ((sync&0x1f0) != 0x100)
+ if ((sync & 0x1f0) != 0x100)
continue;
j -= 9;
/* transcode receive data to 64 bit block of encrypted data */
yl = bf_crypt_inring[j++ & 15];
- yl = (yl<<7) | bf_crypt_inring[j++ & 15]; /* bit7 = 0 */
- yl = (yl<<7) | bf_crypt_inring[j++ & 15]; /* bit7 = 0 */
- yl = (yl<<7) | bf_crypt_inring[j++ & 15]; /* bit7 = 0 */
+ yl = (yl << 7) | bf_crypt_inring[j++ & 15]; /* bit7 = 0 */
+ yl = (yl << 7) | bf_crypt_inring[j++ & 15]; /* bit7 = 0 */
+ yl = (yl << 7) | bf_crypt_inring[j++ & 15]; /* bit7 = 0 */
nibble = bf_crypt_inring[j++ & 15]; /* bit7 = 0 */
yr = nibble;
- yl = (yl<<4) | (nibble>>3);
+ yl = (yl << 4) | (nibble >> 3);
cs2 = bf_crypt_inring[j++ & 15];
- yr = (yr<<7) | (cs2 & 0x7f);
+ yr = (yr << 7) | (cs2 & 0x7f);
cs1 = bf_crypt_inring[j++ & 15];
- yr = (yr<<7) | (cs1 & 0x7f);
+ yr = (yr << 7) | (cs1 & 0x7f);
cs0 = bf_crypt_inring[j++ & 15];
- yr = (yr<<7) | (cs0 & 0x7f);
- yr = (yr<<8) | bf_crypt_inring[j++ & 15];
+ yr = (yr << 7) | (cs0 & 0x7f);
+ yr = (yr << 8) | bf_crypt_inring[j++ & 15];
/* calculate 3-bit checksumme */
- cs = yl ^ (yl>>3) ^ (yl>>6) ^ (yl>>9) ^ (yl>>12) ^ (yl>>15)
- ^ (yl>>18) ^ (yl>>21) ^ (yl>>24) ^ (yl>>27) ^ (yl>>30)
- ^ (yr<<2) ^ (yr>>1) ^ (yr>>4) ^ (yr>>7) ^ (yr>>10)
- ^ (yr>>13) ^ (yr>>16) ^ (yr>>19) ^ (yr>>22) ^ (yr>>25)
- ^ (yr>>28) ^ (yr>>31);
+ cs = yl ^ (yl >> 3) ^ (yl >> 6) ^ (yl >> 9) ^ (yl >> 12) ^ (yl >> 15)
+ ^ (yl >> 18) ^ (yl >> 21) ^ (yl >> 24) ^ (yl >> 27) ^ (yl >> 30)
+ ^ (yr << 2) ^ (yr >> 1) ^ (yr >> 4) ^ (yr >> 7) ^ (yr >> 10)
+ ^ (yr >> 13) ^ (yr >> 16) ^ (yr >> 19) ^ (yr >> 22) ^ (yr >> 25)
+ ^ (yr >> 28) ^ (yr >> 31);
/* check if frame is valid */
- if ((cs&0x7) != (((cs2>>5)&4) | ((cs1>>6)&2) | (cs0 >> 7))) {
+ if ((cs & 0x7) != (((cs2 >> 5) & 4) | ((cs1 >> 6) & 2) | (cs0 >> 7))) {
if (dsp_debug & DEBUG_DSP_BLOWFISH)
printk(KERN_DEBUG
- "DSP BLOWFISH: received corrupt frame, "
- "checksumme is not correct\n");
+ "DSP BLOWFISH: received corrupt frame, "
+ "checksumme is not correct\n");
continue;
}
@@ -537,17 +537,17 @@ dsp_bf_decrypt(struct dsp *dsp, u8 *data, int len)
DROUND(yr, yl, 0);
/* transcode 8 crypted bytes to 9 sample bytes */
- bf_data_out[0] = dsp_audio_seven2law[(yl>>25) & 0x7f];
- bf_data_out[1] = dsp_audio_seven2law[(yl>>18) & 0x7f];
- bf_data_out[2] = dsp_audio_seven2law[(yl>>11) & 0x7f];
- bf_data_out[3] = dsp_audio_seven2law[(yl>>4) & 0x7f];
- bf_data_out[4] = dsp_audio_seven2law[((yl<<3) & 0x78) |
- ((yr>>29) & 0x07)];
-
- bf_data_out[5] = dsp_audio_seven2law[(yr>>22) & 0x7f];
- bf_data_out[6] = dsp_audio_seven2law[(yr>>15) & 0x7f];
- bf_data_out[7] = dsp_audio_seven2law[(yr>>8) & 0x7f];
- bf_data_out[8] = dsp_audio_seven2law[(yr>>1) & 0x7f];
+ bf_data_out[0] = dsp_audio_seven2law[(yl >> 25) & 0x7f];
+ bf_data_out[1] = dsp_audio_seven2law[(yl >> 18) & 0x7f];
+ bf_data_out[2] = dsp_audio_seven2law[(yl >> 11) & 0x7f];
+ bf_data_out[3] = dsp_audio_seven2law[(yl >> 4) & 0x7f];
+ bf_data_out[4] = dsp_audio_seven2law[((yl << 3) & 0x78) |
+ ((yr >> 29) & 0x07)];
+
+ bf_data_out[5] = dsp_audio_seven2law[(yr >> 22) & 0x7f];
+ bf_data_out[6] = dsp_audio_seven2law[(yr >> 15) & 0x7f];
+ bf_data_out[7] = dsp_audio_seven2law[(yr >> 8) & 0x7f];
+ bf_data_out[8] = dsp_audio_seven2law[(yr >> 1) & 0x7f];
k = 0; /* start with new decoded frame */
}
@@ -631,9 +631,9 @@ dsp_bf_init(struct dsp *dsp, const u8 *key, uint keylen)
/* Actual subkey generation */
for (j = 0, i = 0; i < 16 + 2; i++) {
temp = (((u32)key[j] << 24) |
- ((u32)key[(j + 1) % keylen] << 16) |
- ((u32)key[(j + 2) % keylen] << 8) |
- ((u32)key[(j + 3) % keylen]));
+ ((u32)key[(j + 1) % keylen] << 16) |
+ ((u32)key[(j + 2) % keylen] << 8) |
+ ((u32)key[(j + 3) % keylen]));
P[i] = P[i] ^ temp;
j = (j + 4) % keylen;
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-04 17:30:04 +0000